| 简介 |
A magnetic property of a rare earth permanent magnet containing neodymium, iron, and boron is enhanced. [Solution] The present invention is a rare earth permanent magnet with a compound represented by a following expression (1) as a main phase : [Chem. 1] €ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒNd 2 Fe 14 B (1-x) M x €ƒ€ƒ€ƒ€ƒ€ƒ(1) In the expression (1), M represents an element selected from any one of cobalt, beryllium, lithium, aluminum, and silicon and x satisfies 0.01‰¤x‰¤0.25. The main phase has an Nd-Fe-B layer and an Fe layer periodically and part of boron is substituted with any one or more types of elements selected from a group consisting of cobalt, beryllium, lithium, aluminum, and silicon. Furthermore, the main phase contains terbium and praseodymium in addition to the above-mentioned constituents. The rare earth permanent magnet further includes a grain boundary phase containing any one or more types of elements selected from a group consisting of aluminum, copper, niobium, zirconium, titanium, and gallium. |
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